What do all post-2007 diesel particulate filters (DPFs) require periodically?
A) Filter replacement.
B) Bench testing to meet EPA standards.
C) Service intervention to remove ash residues.
D) Pressure testing to check for leaks.

Question

Quizplus · Accepted Answer

All post-2007 diesel particulate filters (DPFs) require periodic service intervention to remove accumulated ash residues. This is necessary to prevent clogging of the filter and to maintain proper operation of the engine. Filter replacement may also be necessary in certain cases, but it is not a universal requirement for all DPFs. Bench testing and pressure testing may be performed as part of routine maintenance or diagnostic procedures, but they are not required on a regular basis for all DPFs.

What Do All Post-2007 Diesel Particulate Filters (DPFs) Require Periodically